Gemini API 2026-09-22

**Gemini 3.8 Flash TTS and Gemini 3.8 Flash-Lite TTS generally available (GA)** : Released our next-generation text-to-speech (TTS) audio models and the Gemini API Voices endpoint (`/v1beta/voices`): - **Gemini 3.8 Flash TTS (`gemini-3.8-flash-tts`)**: Flagship creative TTS model engineered for studio-grade voice fidelity, nuanced acting, regional dialects, and long-form multi-turn stability. - **Gemini 3.8 Flash-Lite TTS (`gemini-3.8-flash-lite-tts`)** : Fast, cost-efficient TTS model built to replace `gemini-3.1-flash-tts-preview` for high-throughput production and real-time voice agent cascades. - **Voice design, Voice replication, and the Extended Voice Library**: Create persistent custom vocal personas from text prompts, replicate voices with consent verification, and query 150+ prebuilt and custom voices. See the Text-to-speech guide to get started.